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From: Dave Hansen <dave.hansen@linux.intel.com>
To: Andy Lutomirski <luto@amacapital.net>, Kees Cook <keescook@chromium.org>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Linux-MM <linux-mm@kvack.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Pavel Emelyanov <xemul@parallels.com>,
	Konstantin Khlebnikov <khlebnikov@openvz.org>,
	Mark Seaborn <mseaborn@chromium.org>
Subject: Re: [RFC, PATCH] pagemap: do not leak physical addresses to non-privileged userspace
Date: Mon, 09 Mar 2015 19:36:12 -0700
Message-ID: <54FE589C.1050705@linux.intel.com> (raw)
In-Reply-To: <CALCETrU_3FS6B7LtkAwdC3e8xfiwdhPjkVWPgxP1Vy2uPeqMtA@mail.gmail.com>

On 03/09/2015 05:19 PM, Andy Lutomirski wrote:
> per-pidns like this is no good.  You shouldn't be able to create a
> non-paranoid pidns if your parent is paranoid.

That sounds like a reasonable addition that shouldn't be hard to add.

> Also, at some point we need actual per-ns controls.  This mount option
> stuff is hideous.

So,

	per-pidns == bad
	per-ns == good

If the pid namespace is the wrong place, which namespace is the right place?


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Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-09 21:11 Kirill A. Shutemov
2015-03-09 21:20 ` Pavel Emelyanov
2015-03-09 22:09 ` Konstantin Khlebnikov
2015-03-10  0:11 ` Kees Cook
2015-03-10  0:19   ` Andy Lutomirski
2015-03-10  2:36     ` Dave Hansen [this message]
2015-03-16 21:11 ` Pavel Machek
2015-03-17  0:49   ` Mark Seaborn
2015-03-17  1:21     ` Andy Lutomirski
2015-03-17 11:16       ` rowhammer and pagemap (was Re: [RFC, PATCH] pagemap: do not leak physical addresses to non-privileged userspace) Pavel Machek
2015-03-17 17:58         ` One Thousand Gnomes
2015-03-23 21:26           ` Pavel Machek
2015-03-19 12:51       ` [RFC, PATCH] pagemap: do not leak physical addresses to non-privileged userspace Vlastimil Babka
2015-03-23 21:26         ` Pavel Machek
2015-03-23 22:36           ` Vlastimil Babka

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